Image Formation Device Correction Pattern Segmentation
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Solution Overview
Problem
Image formation devices face inefficiencies due to the need for extensive correction pattern formation and measurement along the entire length of the belt, which increases processing time and delays the start of image formation, especially when the belt length exceeds the paper length.
Innovation Solution
An image formation device that forms a correction pattern only in the area corresponding to the image formation area on the recording medium, measures the pattern, and corrects the image formation position based on the measurement, thereby reducing processing time and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a correction pattern is formed along the entire length of the belt, then displacement measurement accuracy is improved, but processing time increases
Solution Approach 1:
The belt surface is divided into a measurement area and a non-measurement area. The correction pattern is formed only in the measurement area, which is a segment of the entire belt surface. This segmentation allows the system to obtain sufficient displacement measurement data without processing the entire belt length, thus reducing processing time while maintaining measurement accuracy.
Solution Approach 2:
The measurement function is extracted from the entire belt and concentrated in a specific measurement area. By taking out only the necessary portion (the measurement area) for displacement correction, the system eliminates the need to form and measure correction patterns across the full belt length, significantly reducing processing time while preserving the essential measurement capability.
2Measurement precision
If a correction pattern is formed over a large area, then measurement coverage is improved, but device productivity decreases
Solution Approach 1:
The belt surface is segmented into measurement and non-measurement areas. The correction pattern formation is restricted to the measurement area, which provides sufficient coverage for accurate displacement measurement without requiring the entire belt surface. This segmentation maintains measurement coverage while enabling faster pattern formation and measurement, thus improving device productivity.
Solution Approach 2:
Instead of forming correction patterns across the entire belt surface (excessive action), the system forms patterns only in the necessary measurement area (partial action). This partial action approach provides adequate measurement coverage for displacement correction while significantly reducing the time required for pattern formation and measurement, thereby improving overall device productivity.
3Manufacturing precision
If the correction pattern formation and measurement is executed immediately before print operation, then image quality is ensured, but waiting time increases
Solution Approach 1:
The correction pattern formation and measurement process is segmented to occur only in the measurement area rather than the entire belt. This segmentation reduces the total time required for correction pattern formation and measurement, thereby reducing waiting time before the print operation while still ensuring adequate measurement coverage to maintain image quality.
Solution Approach 2:
The system performs correction pattern formation and measurement only in the necessary measurement area (partial action) rather than the entire belt surface. This partial action approach provides sufficient measurement data to ensure image quality while significantly reducing the waiting time before the print operation can commence.
Data Source
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AI summary
There is provided an image formation device, comprising: an image forming unit configured to execute image formation to form an image on a recording medium; a holding body configured to move relatively with respect to the image forming unit and to hold an image formed thereon by the image forming unit; a controller that controls the image forming unit to form a correction pattern in an area on the holding body, the area being the same image formation area defined on the recording medium whereon the image formation is executed for the recording medium; a measurement unit configured to measure a position of the correction pattern formed on the holding body; and a correction unit configured to correct an image formation position of the image formation unit based on a measurement result of the measurement unit.